Congratulations! We’ll just assume if you’re reading this, you survived Tax Day and are ready to celebrate with a weekend full of fun and deliciousness. If so, you have come to the right place; we have all kinds of cool ideas. As always, be sure to double check event and venue websites for any last-minute changes in health guidelines. Meanwhile, if you’d like to have this Weekender lineup delivered to your inbox every Thursday morning for free, just sign up at www.mercurynews.com/newsletters or www.eastbaytimes.com/newsletters. 1 SEE & HEAR: Great shows are all over From Brian Copeland’s iconic show about San...